Ilia said he is not fighting in Q1, hence the interim title. There is no need to worry about stripping him just yet. It is obnoxious how quickly some fans want to move on from a legit champ to a paper champ.
Given that ilia last fought in late June, then it is fair to say that he should be stripped if he will not be back in Q2. A year seems like the longest period that an undisputed title should not be contested when there is a good reason.
I would argue that neither Paddy nor Justin deserved a shot at Ilia for the belt...and that them having to fight each other for an interim is actually quite good...but the idea that the winner would be elevated to undisputed in preposterous. If they didn't even deserve a shot at Ilia, then clearly they don't deserve the title for this fight.
The interim title means nothing anyway...it is *supposed* to mean that your next fight will be for the real title. Well, if the real champ will still be out, let's make the winner's next fight for the real title...by fighting Arman, the rightful #1 contender in the first place.